New device 'can help simulate cataract replacement experience'

22 August 2016

An innovative new device has been developed to help cataract patients to test artificial lens designs prior to implantation in the eye.

The simultaneous vision simulator or SimVis device was created with the expertise of researchers at the Instituto de Optica at the Consejo Superior de Investigaciones Clientificas in Spain, and has been designed to be handheld and easy to use.

It uses an optoelectronic tunable lens that changes shape in response to an electric current, simulating multifocal lenses by reshaping the tunable lens quickly so the resulting oscillations in focal positions can be perceived by human vision.

Patients looking through the device are able to see near and far distances in focus at the same time, as well as experiencing the loss of image quality and contrast that comes with multifocal lenses.

Currently, decisions on intraocular lens use during cataract surgery is based on the explanations and experience given by the surgeon to the patient, but it can be difficult to properly explain the new visual experience, making it hard to make the choice.

Carlos Dorronsoro, first author of the paper, said: "Clinical use of the SimVis could provide an evidence-based way to assess the subjective needs and preferences of patients before they undergo cataract surgery."

Posted by Jeanette Royston

 


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